Finding the Fourth Proportional to 276.99, 415.18 and 139.74
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Solution
The fourth proportional to 276.99, 415.18 and 139.74 is: 209.46
Step by Step Solution
- Step 1: Write the proportion equation
276.99 : 415.18 = 139.74 : x - Step 2: Convert to fraction form
276.99/415.18 = 139.74/x - Step 3: Cross multiply
276.99x = 415.18 × 139.74 - Step 4: Simplify right side
276.99x = 58,017.25 - Step 5: Solve for x
x = 58,017.25/276.99 - Step 6: Final answer
x = 209.46
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.